Dénoncer belong to the 1
st group. Dénoncer is a common french verb.
Dénoncer is conjugated the same way that verbs that end in :
-cer
Dénoncer is conjugated with
auxiliary avoir.
Dénoncer verb is
direct transitive.
French verb dénoncer can be conjugated in the reflexive form:
Se dénoncer
Dénoncer verb is a direct transitive verb, so passive voice can be used.